java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label02.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 15:52:42,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 15:52:42,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 15:52:42,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 15:52:42,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 15:52:42,311 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 15:52:42,312 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 15:52:42,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 15:52:42,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 15:52:42,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 15:52:42,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 15:52:42,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 15:52:42,321 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 15:52:42,322 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 15:52:42,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 15:52:42,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 15:52:42,326 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 15:52:42,330 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 15:52:42,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 15:52:42,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 15:52:42,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 15:52:42,334 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 15:52:42,334 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 15:52:42,335 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 15:52:42,335 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 15:52:42,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 15:52:42,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 15:52:42,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 15:52:42,338 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-09 15:52:42,354 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 15:52:42,355 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 15:52:42,355 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 15:52:42,355 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 15:52:42,356 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 15:52:42,356 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 15:52:42,356 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 15:52:42,356 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 15:52:42,357 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 15:52:42,357 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 15:52:42,358 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 15:52:42,358 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 15:52:42,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 15:52:42,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 15:52:42,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 15:52:42,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 15:52:42,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 15:52:42,359 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 15:52:42,359 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 15:52:42,359 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 15:52:42,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 15:52:42,360 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 15:52:42,360 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 15:52:42,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 15:52:42,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 15:52:42,361 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 15:52:42,361 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 15:52:42,361 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 15:52:42,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 15:52:42,361 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 15:52:42,389 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 15:52:42,405 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 15:52:42,409 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 15:52:42,411 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 15:52:42,411 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 15:52:42,412 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label02.c [2019-09-09 15:52:42,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f55724340/785f2a9bd6e8465e810928b676c83db8/FLAGc581283f2 [2019-09-09 15:52:43,232 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 15:52:43,233 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label02.c [2019-09-09 15:52:43,277 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f55724340/785f2a9bd6e8465e810928b676c83db8/FLAGc581283f2 [2019-09-09 15:52:43,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f55724340/785f2a9bd6e8465e810928b676c83db8 [2019-09-09 15:52:43,332 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 15:52:43,334 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 15:52:43,339 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 15:52:43,340 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 15:52:43,344 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 15:52:43,346 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:52:43" (1/1) ... [2019-09-09 15:52:43,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5194cf01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:52:43, skipping insertion in model container [2019-09-09 15:52:43,350 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 03:52:43" (1/1) ... [2019-09-09 15:52:43,359 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 15:52:43,550 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 15:52:44,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:52:44,984 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 15:52:45,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 15:52:45,667 INFO L192 MainTranslator]: Completed translation [2019-09-09 15:52:45,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:52:45 WrapperNode [2019-09-09 15:52:45,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 15:52:45,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 15:52:45,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 15:52:45,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 15:52:45,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:52:45" (1/1) ... [2019-09-09 15:52:45,686 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:52:45" (1/1) ... [2019-09-09 15:52:45,765 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:52:45" (1/1) ... [2019-09-09 15:52:45,765 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:52:45" (1/1) ... [2019-09-09 15:52:45,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:52:45" (1/1) ... [2019-09-09 15:52:45,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:52:45" (1/1) ... [2019-09-09 15:52:45,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:52:45" (1/1) ... [2019-09-09 15:52:46,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 15:52:46,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 15:52:46,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 15:52:46,019 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 15:52:46,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:52:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 15:52:46,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 15:52:46,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 15:52:46,108 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 15:52:46,109 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 15:52:46,109 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 15:52:46,109 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 15:52:46,109 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 15:52:46,110 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 15:52:46,111 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 15:52:46,111 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 15:52:46,112 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 15:52:46,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 15:52:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 15:52:46,114 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 15:52:46,115 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 15:52:46,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 15:52:46,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 15:52:51,357 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 15:52:51,357 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 15:52:51,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:52:51 BoogieIcfgContainer [2019-09-09 15:52:51,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 15:52:51,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 15:52:51,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 15:52:51,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 15:52:51,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 03:52:43" (1/3) ... [2019-09-09 15:52:51,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2dfcc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:52:51, skipping insertion in model container [2019-09-09 15:52:51,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 03:52:45" (2/3) ... [2019-09-09 15:52:51,368 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2dfcc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 03:52:51, skipping insertion in model container [2019-09-09 15:52:51,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 03:52:51" (3/3) ... [2019-09-09 15:52:51,378 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label02.c [2019-09-09 15:52:51,392 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 15:52:51,402 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 15:52:51,420 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 15:52:51,450 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 15:52:51,450 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 15:52:51,450 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 15:52:51,450 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 15:52:51,450 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 15:52:51,451 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 15:52:51,451 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 15:52:51,451 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 15:52:51,500 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-09-09 15:52:51,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-09-09 15:52:51,520 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:52:51,521 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:52:51,523 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:52:51,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:52:51,530 INFO L82 PathProgramCache]: Analyzing trace with hash -19130643, now seen corresponding path program 1 times [2019-09-09 15:52:51,532 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:52:51,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:52:51,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:52:51,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:52:51,592 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:52:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:52:51,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 15:52:51,995 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 15:52:51,995 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 15:52:51,995 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:52:52,001 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 15:52:52,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 15:52:52,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 15:52:52,087 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-09-09 15:52:57,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 15:52:57,660 INFO L93 Difference]: Finished difference Result 1610 states and 2807 transitions. [2019-09-09 15:52:57,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 15:52:57,663 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 68 [2019-09-09 15:52:57,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 15:52:57,708 INFO L225 Difference]: With dead ends: 1610 [2019-09-09 15:52:57,708 INFO L226 Difference]: Without dead ends: 1542 [2019-09-09 15:52:57,711 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 15:52:57,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-09-09 15:52:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-09-09 15:52:57,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-09-09 15:52:57,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2702 transitions. [2019-09-09 15:52:57,880 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2702 transitions. Word has length 68 [2019-09-09 15:52:57,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 15:52:57,881 INFO L475 AbstractCegarLoop]: Abstraction has 1542 states and 2702 transitions. [2019-09-09 15:52:57,881 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 15:52:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2702 transitions. [2019-09-09 15:52:57,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-09-09 15:52:57,896 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 15:52:57,897 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 15:52:57,897 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 15:52:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:52:57,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1542176651, now seen corresponding path program 1 times [2019-09-09 15:52:57,899 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 15:52:57,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:52:57,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 15:52:57,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 15:52:57,901 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 15:52:57,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 15:52:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-09 15:52:58,216 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 15:52:58,216 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 15:52:58,219 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 144 with the following transitions: [2019-09-09 15:52:58,222 INFO L207 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2187], [2195], [2203], [2211], [2219], [2227], [2235], [2243], [2251], [2259], [2267], [2275], [2283], [2291], [2299], [2307], [2315], [2319], [2321], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2384], [3240], [3244], [3253], [3257], [3259], [3270], [3271], [3272], [3274], [3275] [2019-09-09 15:52:58,297 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 15:52:58,297 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 15:53:10,212 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 15:53:10,215 INFO L272 AbstractInterpreter]: Visited 82 different actions 159 times. Merged at 4 different actions 5 times. Never widened. Performed 383 root evaluator evaluations with a maximum evaluation depth of 16. Performed 383 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2019-09-09 15:53:10,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 15:53:10,220 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 15:53:15,066 INFO L227 lantSequenceWeakener]: Weakened 140 states. On average, predicates are now at 76.34% of their original sizes. [2019-09-09 15:53:15,066 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 15:53:15,171 INFO L420 sIntCurrentIteration]: We unified 142 AI predicates to 142 [2019-09-09 15:53:15,172 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 15:53:15,172 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 15:53:15,173 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [5] total 14 [2019-09-09 15:53:15,173 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 15:53:15,175 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 15:53:15,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 15:53:15,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-09-09 15:53:15,176 INFO L87 Difference]: Start difference. First operand 1542 states and 2702 transitions. Second operand 11 states. [2019-09-09 15:54:01,101 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.